Section 29A(6) in The Gujarat Provincial Municipal Corporations Act, 1949
(6)In the event of the office of the Chairperson falling vacant before the expiry of its term, the wards committee shall, as soon as conveniently may be after the occurrence of the vacancy, elect a new Chairperson in accordance with sub-section (3):Provided that the Chairperson so elected shall hold office so long only as the person in whose place he is elected would have held it if such vacancy had not occurred.